MC908MR16CFUE Datasheet, PDF (257/282 Pages) Freescale Semiconductor, Inc – On-chip programming firmware for use with host personal computer, Clock generator module (CGM)

Monitor ROM (MON)
V_DD
10 kΩ
S1
0.1 µF
MC68HC908MR16/
MC68HC908MR32
RST
V_HI
10 kΩ
1
+
10 µF
3
4
10 µF
+2
MC145407
20
+
10 µF
18
17
10 µF ^VDD
19 ⁺
V_DDA
0.1 µF
V_DDAD
V_REFH
0.1 µF
0.1 µF
DB-25
2
5
16
3
6
15
7
0.02 µF
20 pF
X1
4.9152 MHz
10 MΩ
V_DD
1
14
MC74HC125
2
3
20 pF
6
5
4
V_DD
0.1 µF
V_DD
7
V_DD
10 kΩ
10 kΩ
A
S3
B
V_DD
V_DD
S2 Position A — Bus clock = CGMXCLK ÷ 4 or CGMVCLK ÷ 4
S2 Position B — Bus clock = CGMXCLK ÷ 2
S3 Position A — Parallel communication
S3 Position B — Serial communication
10 kΩ
A
10 kΩ
S2
B
Figure 18-8. Monitor Mode Circuit
IRQ
V_DDA
V_DDAD
V_REFH
CGMXFC
OSC1
OSC2
V_REFL
V_SSAD
V_SSA
PWMGND
V_SS
V_DD
PTA0
PTA7
PTC2
PTC3
PTC4
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
Freescale Semiconductor
257